#!usr/bin/env python3
# _*_ coding:utf-8 _*_

def hello(greeting,*args):
	if(len(args)==0):
		print('%s!' % greeting)
	else:
		print('%s,%s!' % (greeting,','.join(args)))

hello('Hi')
hello('Hi','Sarch')
hello('Hi','Sarch','wangkaixuan','chengangrong')

name = ('wangkaixuan','chengangrong')
hello('Hi',*name)